SERVICER ADVANCE INVESTMENTS - Schedule of Additional Information Regarding the Servicer Advance Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Investments in and Advances to Affiliates [Line Items]
Outstanding Servicer Advances	$ 357,220	$ 376,881
Face Amount of Secured Notes and Bonds Payable	29,014,659
Servicer advance investments | Servicer Advances
Investments in and Advances to Affiliates [Line Items]
UPB of Underlying Residential Mortgage Loans	13,974,237	15,499,559
Outstanding Servicer Advances	$ 302,282	$ 320,630
Servicer Advances to UPB of Underlying Residential Mortgage Loans	2.20%	2.10%
Face Amount of Secured Notes and Bonds Payable	$ 262,069	$ 278,845
Loan-to-value, gross	84.70%	84.10%
Loan-to-value, net	82.50%	81.90%
Cost of funds, gross	7.30%	7.50%
Cost of funds, net	6.90%	6.90%